Analysis of surface property of amphiphilic polymer by inverse phase gas chromatography

The surface physico-chemical property of the triblock amphiphilic copolymers, poly (styrene) -poly (ethyleneoxide) -poly( styrene)(SEOS), was studied by using inverse phase gas chromatographic probe technique. The properties included thermodynamic function of surface adsorption, dispersive component of the surface energy (r(s)(d)) and thermodynamic interaction between SEOS and solvent with different chemical nature. The relation between surface property and relative content of the lipophilic polystyrene and the hydrophilic poly( ethylene oxide) in molecule-chain of copolymer was examined. The result showed that r(s)(d) of SEOS was lower than that of polyethylene glycol (PEG), and increased as the ethylene oxide content increased in SEOS copolymers. The surface adsorption and thermodynamic interaction with probe were also increased with the increase of ethylene oxide content in SEOS.